It seems like the issue has been resolved. Might have been the update after all, not entirely sure. Perhaps the cache messed things up.
Thank you for your response. This can be marked as solved.
I’ve just updated to DHVC version 1.4.5 but the issue still persists.
Hello, I think I’ve found the problem. I had to set up the TLS settings of the site. The emailing works now. Thanks for any effort in helping out!